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PHYSICS MCQs

Total Questions : 3767 | Page 51 of 377 pages
Question 501. A Fuse wire is characterised by
  1.    High resistance and low melting point
  2.    High resistance and high melting point
  3.    Low resistance and high melting point
  4.    Low resistance and low melting point
 Discuss Question
Answer: Option A. -> High resistance and low melting point
Question 502. When the main switch of the house is put off it disconnects the
  1.    Live wire only
  2.    Live wire and the earth wire
  3.    Live wire and the neutral wire
  4.    Earth wire and the neutral wire
 Discuss Question
Answer: Option C. -> Live wire and the neutral wire
Question 503. Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.
  1.    12500
  2.    20
  3.    40
  4.    6250
 Discuss Question
Answer: Option B. -> 20
Question 504. Electric power is measured in units of
  1.    Volt
  2.    Joule
  3.    Watt
  4.    Ampere
 Discuss Question
Answer: Option C. -> Watt
Question 505. What is the value of 1 kW = ?
  1.    1000 W
  2.    10 W
  3.    100 W
  4.    10000 W
 Discuss Question
Answer: Option A. -> 1000 W
Question 506. The electric current in a metal wire is due to the flow of -
  1.    Electrons
  2.    Protons
  3.    Ions
  4.    Holes
 Discuss Question
Answer: Option A. -> Electrons
Question 507. An electric fuse is based on
  1.    The chemical effect of the current
  2.    The magnetic effect of the current
  3.    The heating effect of the current
  4.    All of the above
 Discuss Question
Answer: Option C. -> The heating effect of the current
Question 508. Metals are good conductors of electricity because
  1.    The atoms are lightly packed
  2.    They contain free electrons
  3.    They have high melting point
  4.    All the above
 Discuss Question
Answer: Option B. -> They contain free electrons
Question 509. Find the current (in A) when a charge of 1200C flows in 6 seconds.
  1.    7200
  2.    200
  3.    100
  4.    3600
 Discuss Question
Answer: Option B. -> 200
Question 510. The fuse in an electric circuit is connected in
  1.    Series with neutral
  2.    Parallel to live
  3.    Parallel to neutral
  4.    Series with live
 Discuss Question
Answer: Option D. -> Series with live

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